Park Tool Freewheel Remover FR-4

The FR-4 is designed to fit the 20-spline tool fittings found on older SunTour freewheels. Constructed from heat treated alloy tool steel, the FR-4 features a 1" tool fitting for use with an adjustable wrench, socket, or bench vise.

FR-4 Features

- Fits 20-spline tool fittings with an approximate outer diameter of 21.6 mm
- Fits Atom, Regina, splined Zeus, and some Schwinn-approved freewheels
- 1" hexagonal base can be used with 1" socket or wrench